/*  Copyright Mihai Bazon, 2002, 2003  |  http://dynarch.com/mishoo/
 * ---------------------------------------------------------------------------
 *
 * The DHTML Calendar
 *
 * Details and latest version at:
 * http://dynarch.com/mishoo/calendar.epl
 *
 * This script is distributed under the GNU Lesser General Public License.
 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html
 *
 * This file defines helper functions for setting up the calendar.  They are
 * intended to help non-programmers get a working calendar on their site
 * quickly.  This script should not be seen as part of the calendar.  It just
 * shows you what one can do with the calendar, while in the same time
 * providing a quick and simple method for setting it up.  If you need
 * exhaustive customization of the calendar creation process feel free to
 * modify this code to suit your needs (this is recommended and much better
 * than modifying calendar.js itself).
 */
 Calendar.setup = function(params) {

     function param_default(pname, def) {
         if (typeof params[pname] == "undefined") {
             params[pname] = def;
         }
     }

     ;
     param_default("inputField", null);
     param_default("displayArea", null);
     param_default("button", null);
     param_default("eventName", "click");
     param_default("ifFormat", "%Y/%m/%d");
     param_default("daFormat", "%Y/%m/%d");
     param_default("singleClick", true);
     param_default("disableFunc", null);
     param_default("dateStatusFunc", params["disableFunc"]);
     param_default("dateText", null);
     param_default("firstDay", null);
     param_default("align", "Br");
     param_default("range", [1900, 2999]);
     param_default("weekNumbers", true);
     param_default("flat", null);
     param_default("flatCallback", null);
     param_default("onSelect", null);
     param_default("onClose", null);
     param_default("onUpdate", null);
     param_default("date", null);
     param_default("showsTime", false);
     param_default("timeFormat", "24");
     param_default("electric", true);
     param_default("step", 2);
     param_default("position", null);
     param_default("cache", false);
     param_default("showOthers", false);
     param_default("multiple", null);
     var tmp = ["inputField", "displayArea", "button"];
     for (var i in tmp) {
         if (typeof params[tmp[i]] == "string") {
             params[tmp[i]] = document.getElementById(params[tmp[i]]);
         }
     }
     if (!(params.flat || params.multiple || params.inputField || params.displayArea || params.button)) {
         alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
         return false;
     }

     function onSelect(cal) {
         var p = cal.params;
         var update = (cal.dateClicked || p.electric);
         if (update && p.inputField) {
             p.inputField.value = cal.date.print(p.ifFormat);
             if (typeof p.inputField.onchange == "function") p.inputField.onchange();
         }
         if (update && p.displayArea) p.displayArea.innerHTML = cal.date.print(p.daFormat);
         if (update && typeof p.onUpdate == "function") p.onUpdate(cal);
         if (update && p.flat) {
             if (typeof p.flatCallback == "function") p.flatCallback(cal);
         }
         if (update && p.singleClick && cal.dateClicked) cal.callCloseHandler();
     }

     ;
     if (params.flat != null) {
         if (typeof params.flat == "string") params.flat = document.getElementById(params.flat);
         if (!params.flat) {
             alert("Calendar.setup:\n  Flat specified but can't find parent.");
             return false;
         }
         var cal = new Calendar(params.firstDay, params.date, params.onSelect || onSelect);
         cal.showsOtherMonths = params.showOthers;
         cal.showsTime = params.showsTime;
         cal.time24 = (params.timeFormat == "24");
         cal.params = params;
         cal.weekNumbers = params.weekNumbers;
         cal.setRange(params.range[0], params.range[1]);
         cal.setDateStatusHandler(params.dateStatusFunc);
         cal.getDateText = params.dateText;
         if (params.ifFormat) {
             cal.setDateFormat(params.ifFormat);
         }
         if (params.inputField && typeof params.inputField.value == "string") {
             cal.parseDate(params.inputField.value);
         }
         cal.create(params.flat);
         cal.show();
         return false;
     }
     var triggerEl = params.button || params.displayArea || params.inputField;
     triggerEl["on" + params.eventName] = function() {
         var dateEl = params.inputField || params.displayArea;
         var dateFmt = params.inputField ? params.ifFormat : params.daFormat;
         var mustCreate = false;
         var cal = window.calendar;
         if (dateEl) params.date = Date.parseDate(dateEl.value || dateEl.innerHTML, dateFmt);
         if (!(cal && params.cache)) {
             window.calendar = cal = new Calendar(params.firstDay, params.date, params.onSelect || onSelect, params.onClose || function(cal) { cal.hide(); });
             cal.showsTime = params.showsTime;
             cal.time24 = (params.timeFormat == "24");
             cal.weekNumbers = params.weekNumbers;
             mustCreate = true;
         } else {
             if (params.date) cal.setDate(params.date);
             cal.hide();
         }
         if (params.multiple) {
             cal.multiple = { };
             for (var i = params.multiple.length; --i >= 0;) {
                 var d = params.multiple[i];
                 var ds = d.print("%Y%m%d");
                 cal.multiple[ds] = d;
             }
         }
         cal.showsOtherMonths = params.showOthers;
         cal.yearStep = params.step;
         cal.setRange(params.range[0], params.range[1]);
         cal.params = params;
         cal.setDateStatusHandler(params.dateStatusFunc);
         cal.getDateText = params.dateText;
         cal.setDateFormat(dateFmt);
         if (mustCreate) cal.create();
         cal.refresh();
         if (!params.position) cal.showAtElement(params.button || params.displayArea || params.inputField, params.align);
         else cal.showAt(params.position[0], params.position[1]);
         return false;
     };
     return cal;
 };